abstract |
One aspect of the present invention includes an oxynitride having a ? -Type Si 3 N 4 crystal structure and represented by a composition formula Si 6 -z Al z O z N 8 -z : Eu a , M b , M is at least one selected from Sr and Ba, the amount of Eu added is in the range of 0.1 to 5 mol%, the amount of M added is in the range of 0.1 to 10 mol% 1, and emits light having a peak wavelength in the range of 500 to 550 nm by irradiating an excitation circle. |